Location of the gene for theta antigen in the mouse. II. Three-point crosses place Thy-1 in proximal region of chromosome 9.

Males of a partially inbred mouse stock homozygous for cw and d were crossed to AKR/ABom females. Progeny obtained by backcrossing heterozygous F1 females to cw d/cw d males were analyzed for the markers cw, Thy-1, d, and Mod-1. Three- and four-point recombination data are consistent with the map: cw--29--Thy-1--12--d--5--Mod-1, in which cw is nearest to the centromere. These recombination data are discussed in relation to previous multiple-point recombination studies of chromosome 9.